This extension was part of Blender 4.1 bundled add-ons. It is now offered as it is, with limited supported.
No changelog for this release.
This extension does not require special permissions.
Confirmed, the addon crashes Blender after drawing annotation lines and pressing the "Add Surfaces" button.
Bsurface 1.8.3 crash Blender 4.3.2
Works fine for me on Blender 4.3